1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.util;
24  
25  import java.io.ByteArrayOutputStream;
26  
27  /**
28   * <a href="ByteArrayMaker.java.html"><b><i>View Source</i></b></a>
29   *
30   * @author Harry Mark
31   */
32  public class ByteArrayMaker extends ByteArrayOutputStream {
33  
34      static boolean collect = false;
35  
36      static {
37          String collectString = System.getProperty(MakerStats.class.getName());
38  
39          if (collectString != null) {
40              if (collectString.equals("true")) {
41                  collect = true;
42              }
43          }
44      }
45  
46      static MakerStats stats = null;
47  
48      static {
49          if (collect) {
50              stats = new MakerStats(ByteArrayMaker.class.toString());
51          }
52      }
53  
54      static int defaultInitSize = 8000;
55  
56      static {
57          String defaultInitSizeString = System.getProperty(
58              ByteArrayMaker.class.getName() + ".initial.size");
59  
60          if (defaultInitSizeString != null) {
61              try {
62                  defaultInitSize = Integer.parseInt(defaultInitSizeString);
63              }
64              catch (Exception e) {
65                  e.printStackTrace();
66              }
67          }
68      }
69  
70      public static MakerStats getStatistics() {
71          return stats;
72      }
73  
74      public ByteArrayMaker() {
75          super(defaultInitSize);
76  
77          if (collect) {
78              _getInfo(new Throwable());
79          }
80      }
81  
82      public ByteArrayMaker(int size) {
83          super(size);
84  
85          if (collect) {
86              _getInfo(new Throwable());
87          }
88      }
89  
90      public byte[] toByteArray() {
91          if (collect) {
92              stats.add(_caller, _initSize, count);
93          }
94  
95          return super.toByteArray();
96      }
97  
98      public String toString() {
99          return super.toString();
100     }
101 
102     private void _getInfo(Throwable t) {
103         _initSize = buf.length;
104 
105         StackTraceElement[] elements = t.getStackTrace();
106 
107         if (elements.length > 1) {
108             StackTraceElement el = elements[1];
109 
110             _caller =
111                 el.getClassName() + StringPool.PERIOD + el.getMethodName() +
112                     StringPool.COLON + el.getLineNumber();
113         }
114     }
115 
116     private int _initSize;
117     private String _caller;
118 
119 }